Free Tool

CYCLING HEART RATE ZONES CALCULATOR

Calculate five continuous bpm ranges from cycling Max HR or LTHR.

YOUR MAX HEART RATE (BPM)

Use a measured cycling max where possible; age formulas are rough population estimates.

Quick answer

Enter a measured cycling maximum heart rate or a cycling-specific LTHR estimate. The calculator returns five continuous whole-bpm ranges. Max-HR mode uses 50%, 60%, 70%, 80%, 90% and 100% boundaries; LTHR mode condenses Joe Friel's cycling convention into five displayed bands. The output is a coaching estimate, not a laboratory threshold measurement.

WHAT IT DOES

This calculator converts one cycling-specific anchor into five gap-free ranges that can be copied into a head unit or training platform. Within the displayed Max-HR span—or across the open-ended LTHR table—each whole bpm belongs to exactly one range.

Heart rate describes the body's internal response, while power describes external work and perceived exertion describes how the effort feels. Those signals can disagree, so the calculated bands are starting points to interpret alongside breathing, RPE, power, conditions and the purpose of the session.

WHO IT'S FOR

→Cyclists who need five heart-rate ranges for a head unit or training platform
→Riders training without a power meter
→Athletes comparing heart-rate response with power and perceived exertion
→Coaches and self-coached riders who want a disclosed percentage convention

HOW IT WORKS

Max-HR mode applies a simple percentage-of-maximum convention: 50–60%, above 60–70%, above 70–80%, above 80–90% and above 90–100%. This is not the Karvonen heart-rate-reserve method. LTHR mode uses Friel-style cycling boundaries: up to 81%, above 81–90%, above 90–94%, above 94–100% and above 100% of the entered threshold-HR estimate. The traditional 5a, 5b and 5c subdivisions are collapsed into one open-ended Zone 5. Roadman rounds each upper boundary to a whole bpm and starts the next band one bpm higher, preventing overlaps. The two methods answer different questions and can produce different bands. An age equation is only a population estimate of maximum heart rate. An LTHR field test estimates a cycling-specific anchor; it does not directly measure blood lactate or make the percentage bands individually validated metabolic thresholds.

01
Choose one cycling-specific method
Use Max HR only when you have a credible maximum recorded while cycling. Use LTHR only when it comes from a documented cycling lab or repeatable field protocol. Do not mix a running anchor with cycling zones.
02
Enter the anchor
Enter a whole-bpm value from 100 to 220. If you only have an age equation, label it as an estimate and replace it when you have a valid measured value.
03
Calculate the five ranges
Read the method label and the exact bpm bands. The displayed five-zone table is a coaching convention; it is not interchangeable with a three-zone research model or another platform's labels.
04
Copy the result consistently
Use the same method and anchor in your head unit, training platform and plan. Record the protocol and test date so a later result can be compared like for like.
05
Cross-check the ride
Compare heart rate with breathing, RPE and power where available. Heart rate responds with delay and may drift during sustained exercise, especially as heat strain or dehydration changes.
06
Reassess abnormal responses
Do not force a target when illness, medication, heat or an unusual heart-rate response changes the meaning of the number. Stop and seek appropriate medical advice for concerning symptoms.

EXAMPLE CALCULATIONS

Cycling LTHR estimate of 168 bpm

· Method: LTHR
· Cycling LTHR estimate: 168 bpm

Z1: ≤136 bpm · Z2: 137–151 bpm · Z3: 152–158 bpm · Z4: 159–168 bpm · Z5: ≥169 bpm.

Measured cycling Max HR of 188 bpm

· Method: Max HR
· Measured cycling Max HR: 188 bpm

Z1: 94–113 bpm · Z2: 114–132 bpm · Z3: 133–150 bpm · Z4: 151–169 bpm · Z5: 170–188 bpm.

LIMITATIONS

Fixed percentages cannot locate every rider's lactate or ventilatory thresholds. Published age equations have substantial individual error, and even exercise-intensity prescription from percentage anchors can misclassify metabolic response. Heart rate also changes with heat, hydration, fatigue, illness, stimulants and rate-limiting medication, and it lags rapid changes in work rate. Power, heart rate and RPE measure different signals; no one metric is universally primary. Finally, these five displayed bands are not interchangeable with the three-zone models used in training-intensity-distribution research, so the calculator cannot prescribe a universal polarised or 80/20 programme.

When to see a coach

A coach or sports scientist can help when repeatable field tests disagree, your heart-rate and power responses diverge, or a plan needs individual threshold testing. Seek medical assessment—not a calculator or coach—for chest pain, fainting, unexplained palpitations, an abnormal response to exercise, or questions about exercise with a cardiovascular condition or rate-limiting medication.

SOURCES & TRUST

Author

Anthony Walsh — Cycling Coach & Podcast Host

Evidence sources

Joe Friel: A Quick Guide to Setting Zones — original cycling LTHR zone convention and current author clarification
Tanaka, Monahan & Seals (2001) — age-predicted maximum-heart-rate population equation and prediction error
Nes et al. (2013), HUNT Fitness Study — maximum-heart-rate equation and reported standard error of estimate
Mann, Lamberts & Lambert (2013) — limitations of fixed percentage anchors for exercise-intensity prescription
Meixner et al. (2025) — inter-individual variability in fixed-percentage Zone 2 prescriptions in cyclists
Sanders, Myers & Akubat (2017) — differences between heart rate, power and perceived-exertion intensity distributions
Wingo et al. (2020) — cycling cardiovascular drift and heat-strain context
Jamnick et al. (2020) — threshold-based exercise-intensity framework and limits of relative percentages

Reviewed by Anthony Walsh — source-to-claim and calculator-method review · Updated 26 August 2026

Editorial standards · Report a correction

FREQUENTLY ASKED QUESTIONS

How are cycling heart-rate zones calculated?+

Roadman's Max-HR mode uses five percentage-of-maximum bands with boundaries at 50%, 60%, 70%, 80%, 90% and 100%. LTHR mode uses a condensed Friel-style cycling convention with boundaries at 81%, 90%, 94% and 100% of the entered LTHR estimate. The calculator rounds to continuous whole-bpm ranges. Other devices may use different models, so compare both the anchor and the percentages before copying labels.

Should I use Max HR or LTHR for cycling zones?+

Use the method that matches a credible cycling-specific measurement and the plan you are following. Max-HR percentages are simple but an age-predicted maximum can be far from an individual's value. LTHR can provide a cycling-specific field anchor, but its result depends on the protocol and is still an estimate rather than a direct laboratory measurement. Do not treat outputs from the two methods as interchangeable.

Is 220 minus age accurate for maximum heart rate?+

No age equation can accurately predict every individual's maximum heart rate. Research-derived equations describe population trends and have substantial individual prediction error. If you use one because no measured value is available, label the result as a provisional estimate rather than your true cycling Max HR. A maximal test may be inappropriate for some riders, so use professional screening or supervision when health or symptoms warrant it.

Is cycling LTHR the same as FTP or laboratory lactate threshold?+

No. FTP is a power estimate, while LTHR is a heart-rate anchor derived from a particular protocol. A field LTHR can be useful for scaling training, but it does not directly measure blood lactate and should not be assumed to equal a laboratory threshold. Keep the protocol, device and conditions consistent when tracking change.

Why does heart rate drift during a long ride or in heat?+

During prolonged cycling, heart rate can rise even when power stays steady. Heat strain and fluid loss can contribute, but the size and direction of the response are individual and condition-dependent. Use the trend with power, RPE, breathing and environmental context rather than automatically raising power to hold a prescribed heart-rate band.

Should I train by heart rate, power or perceived exertion?+

They answer different questions: power records external work, heart rate records part of the internal response, and RPE records the athlete's integrated perception. Research shows that training-intensity distributions can look different depending on which measure is used. For short efforts, power and RPE often respond faster; for steady rides, heart-rate trends add useful context. Use the combination that fits the session and your equipment.